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Which color treatment is oxidative and deepens or changes the tone without lightening?

  1. Permanent color

  2. Semi-permanent color

  3. Demi-permanent color

  4. Brown

The correct answer is: Demi-permanent color

Demi-permanent color is a type of oxidative color treatment that does not lighten the hair. It gradually fades over time and leaves the hair with a deeper or changed tone. Permanent color, on the other hand, uses a higher level of developer and can lighten the hair as well as deepen or change the tone. Semi-permanent color does not use a developer and only coats the hair, providing a temporary change in tone. Brown is not a type of color treatment and therefore is not the correct answer.